Source : Webster's Revised Unabridged Dictionary (1913)

Mischoose \Mis*choose"\, v. t. [imp. {Mischose}; p. p.
   {Mischosen}; p. pr. & vb. n. {Mischoosing}.]
   To choose wrongly. --Milton.

Mischoose \Mis*choose"\, v. i.
   To make a wrong choice.